feat: Added DB_NAME as variable

Author: spuerta10

src/db/scripts/01_create_tables.sql

@@ -1,4 +1,4 @@
-\c event_access;
+\c :DB_NAME;
 
 CREATE TABLE users (
     user_id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

src/db/scripts/02_create_ticket_stored_procedures.sql

@@ -1,4 +1,4 @@
-\c event_access;
+\c :DB_NAME;
 
 CREATE OR REPLACE PROCEDURE sp_register_ticket_to_user(
     p_ticket_id UUID,

src/db/scripts/03_populate_tables.sql

@@ -1,6 +1,6 @@
 CREATE EXTENSION IF NOT EXISTS pgcrypto;
 
-\c event_access;
+\c :DB_NAME;
 
 INSERT INTO users (username, password_hash)
 VALUES